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9f77b1a1de
Summary: std::tuple marks its constructors as noexcept when the corresponding memberwise constructors are noexcept too -- this commit improves std::pair so that it behaves the same. This is a re-application of r348824, which broke the build in C++03 mode because a test was marked as supported in C++03 when it shouldn't be. Note: I did not add support in the explicit and non-explicit `pair(_Tuple&& __p)` constructors because those are non-standard extensions, and supporting them properly is tedious (we have to copy the rvalue-referenceness of the deduced _Tuple&& onto the result of tuple_element). <rdar://problem/29537079> Reviewers: mclow.lists, EricWF Subscribers: christof, llvm-commits Differential Revision: https://reviews.llvm.org/D48669 llvm-svn: 348847